Chapter 1 Flashcards
What is physiology?
Study of body functions
Physiologist
Identifies the mechanisms by which a process occurs in the body
Organs
Combinations of two or more types of tissue acting together to perform one or more functions
Body system
Collections of organs that perform related actions and interact to accomplish a common activity
Glands
epithelial tissue derivatives specialized for secretion
Excorine glands
secrete through ducts to the outside the body
Endocrine Glands
release their secretory products / hormones into the bloodstream
Lumen
cavity within a hallow organ or tube
Plasma
field portion of the blood
Interstitial fluid
fluid hat surround sand baths the cell
List the levels of organization from smallest to largest
cells, tissues, organs, body systems, and organisms
what is a homeostatsis control system?
A functionally interconnected network of body components that operates to maintain a given factor at a relatively constant optimal level
Describe the types of homeostasis controls system
Intrinsic: built into the organ
Extrinsic and systemic: Regulated by mechanisms outside of the organ. Serves many organs towards a common goal.
List the parts of a control system and define them
controlled variable: a factor that can vary within a narrow range
sensor: monitors the magnitude of the controlled variable.
set point: Desired magnitude of the controlled variable
integrator/control center: Compares sensory input with a set point and adjusts to oppose deviation from the set point/
Effector: Component of the control system which is told to bring about the desired effect
What factors that regulated homeostatic are?
concentration of nutrient
the concentration of oxygen and Co2
PH
the concentration of water, salt, and electrolytes
volume and pressure
temperature
